640475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1$

素因数の和:175

約数の個数: 24

約数和(自身を含む): 924048

約数和(自身を除く): 283573

約数列:

[1, 5, 11, 17, 25, 55, 85, 137, 187, 275, 425, 685, 935, 1507, 2329, 3425, 4675, 7535, 11645, 25619, 37675, 58225, 128095, 640475]

約数ペア:

[(1, 640475), (5, 128095), (11, 58225), (17, 37675), (25, 25619), (55, 11645), (85, 7535), (137, 4675), (187, 3425), (275, 2329), (425, 1507), (685, 935)]